DIYtoolifz Cordless Impact Wrench 1/2 inch for Milwaukee 18V Battery,600 Ft-lbs (810N. m) Brushless High Torque Power Tool with LED Work Light and Belt Clip (Battery Not Included) - Amazon.com
Milwaukee M18 Fuel 1/2-inch High Torque Impact Wrench 2967 Review - Pro Tool Reviews
M18 FUEL™ w/ ONE-KEY™ High Torque Impact Wrench 1/2" Friction Ring (Tool Only)